Covering device for the front area of a device for the passage of air as well as device for the passage of air

ABSTRACT

In a covering device ( 100 ) for covering the front area of a device for the passage of air ( 200 ) for fitting in an opening in a wall of a casing, in particular of a casing of waste heat producing components, of an electronic cupboard or of a switch cupboard and for the filter mat ( 60 ) of the device for the passage of air, whereby the covering device comprises a design cover ( 80 ) covering the filter mat ( 60 ) with a number of inclined lamellar elements ( 90 ), each lamellar element ( 90 ) has in its upper area ( 90   a ) a section with a hook-type configuration ( 95 ) orientated against the air admission.

FIELD OF APPLICATION

This invention relates to a covering device for the front area of adevice for the passage of air according to the preamble of claim 1 aswell as a device for the passage of air.

PRIOR ART

Such a covering device which is sometimes also designated as coveringcasing, as covering plate, as cover plate or even as “design cover”, isgenerally placed before the front area of a filter fan. Since such afilter fan in operation sucks (ambient) air through a filter mat, itcannot be avoided that the covering device also sucks liquid particlesor liquids drops—such as rain water drops in case of outer parts of thefilter fan—which are in the (ambient) air. Liquid as well as substanceswith a liquid like consistency necessarily accumulate in the area of thecovering device, in particular in the area between the covering deviceand the filter fan.

AIM, SOLUTION, ADVANTAGE

Thus, the aim of this invention is to provide the design cover of adevice for the passage of air with lamellar elements which prevent orreduce the penetration of water or dust particles into the filter matand which guarantee the retaining and outer discharge of water withoutreducing the air direct flow quantity.

This aim is achieved for a covering device according to the art with thecharacteristics indicated in claim 1. Accordingly, the inventionconsists in that each lamellar element has in its upper area a sectionwith a hook-type configuration orientated against the air admission.

The section with the hook-type configuration extends over the length ofthe lamellar element.

This being, the lamellar elements are placed with respect to each otherin such a manner that the lamellar elements overlap sectionwise, wherebythe lower area of each lamellar element is situated on a sectionhorizontal plane E below the section with the hook-type configuration oron a horizontal plane E1 situated above the section with the hook-typeconfiguration or in an area between both planes E and E1.

Further advantageous configurations and appropriate improvements of theinvention are characterized in the subclaims.

According to a further embodiment, the covering device consists of aframe-type casing for receiving the filter mat and a design cover heldfixedly, detachably or swivellably in the casing and covering the filtermat, which comprises at least two lateral retaining elements havingpreferably the shape of cheeks, extending on the edge in a longitudinaldirection, between which several lamellar elements are placed which areplaced spaced from each other by simultaneously overlapping each othersectionwise and which are placed obliquely in such a manner that therespectively front and outer situated lamellar edges are placed lowerthan the rear lamellar edges, whereby the upper rear lamellar edges ofthe lamellar elements which have preferably an arc-shaped configuration,have a barb-shaped configuration.

The single lamellar elements are placed with respect to each other insuch a manner that a high optical overlapping and a visual protection ofthe filter mat is obtained with an optimal air permeability.

For achieving a noise optimized lamellar shape, each lamellar elementhas rounded front lamellar edges.

Furthermore, the invention provides that the rear lamellar border edgewhich has the barber-type configuration of each lamellar element has across-section shape which corresponds approximately to the shape of ahalf circle with a section projecting on the front side.

A further embodiment of the invention consists in that the area of thefront lamellar edge of each lamellar element has a materialreinforcement so that the lower situated front border edge area of eachlamellar element has a bigger thickness compared to the rear and highersituated border edge area.

Due to the configuration according to the invention of the coveringdevice, in particular due to the conformation of the single lamellarelements, it is achieved that dust and water sucked by the fan of thefilter fan is at least or partially retained by the lamellar elements.Water meeting onto the covering device mainly runs out outwards so thatthe filter mat is only slightly or little wetted by the water.

Moreover, the invention according to claim 11 relates to a device forthe passage of air, such as a filter fan or outlet filter, for fittingin an opening in a wall of a casing, in particular of a casing of wasteheat producing components, of an electronic cupboard, of a switchcupboard, of a casing system or of a computer system, with a coveringdevice, in particular for covering the front area of the device for thepassage of air and for the filter mat of the device for the passage ofair, whereby the covering device comprises a design cover covering thefilter mat with a number of inclined lamellar elements, whereby eachlamellar element has in its upper area a section with a hook-typeconfiguration orientated against the air admission.

For this embodiment too, the section with the hook-type configurationextends over the length of the lamellar element.

The lamellar elements are placed with respect to each other in such amanner that the lamellar elements overlap sectionwise, whereby the lowerarea of each lamellar element is situated on a horizontal plane E belowthe section with the hook-type configuration or on a horizontal plane E1above the section with the hook-type configuration or in an area betweenthe two planes E and E1.

Improvements of the device for the passage of air with the coveringdevice are the subject of the claims 12 to 20.

SHORT DESCRIPTION OF THE DRAWINGS

Embodiments of the invention are represented in the drawings.

FIG. 1 shows a perspective exploded view of a device for the passage ofair as a filter fan with the covering device configured according to theinvention as a design cover with lamellar elements configured in thedesign cover.

FIG. 2 shows a graphical representation of the basic casing of thedevice for the passage of air with a design cover swung open and with afilter mat situated between the basic casing and the design cover.

FIG. 3 shows a vertical section through the device for the passage ofair.

FIG. 4 shows a front view of the design cover with lamellar elements.

FIG. 5 shows a graphical rear view of the design cover.

FIG. 6 shows an enlarged graphical representation of a section of thedesign cover.

FIG. 7 shows an enlarged graphical representation of a section of thedesign cover.

FIG. 8 shows an enlarged longitudinal section of the section of thedesign cover with lamellar elements with an end-sided hook-typeconfiguration.

FIG. 8A shows an enlarged longitudinal section of a further embodimentof the section of the design cover with lamellar elements.

FIG. 9 shows schematically the arrangement of two lamellar elements withaerodynamically configured front end areas.

DETAILED DESCRIPTION OF THE INVENTION AND BEST WAY FOR CARRYING OUT THEINVENTION

The device for the passage of air 200 represented in FIG. 1 to 3 can beused as outlet filter in relation with a blast or fan as a filter fanand without fan 20 as an outlet filter. The device for the passage ofair 200 is used for casings of waste heat producing components such asswitch cupboards, electronic cupboards, computer systems or the like,whereby the device for the passage of air 200 is mounted in mountingopenings 50 in a wall 59 of such a casing (FIG. 3).

The essential components of the device for the passage of air 200 are afan grid which is configured as design cover 80 with aeration slits andthe covering device according to the invention 100 forms a basic casing21, a blast support 25 for the blast 26 and the blast 26 when the devicefor the passage of air 200 is used as a filter fan (FIG. 1 to 3).

The covering device 100 which constitutes the fan grid, is configured asa design cover 80 and consists of a frame-type casing 30 with lamellarelements 90, whereby aeration slits are configured between thesectionwise overlapping lamellar elements 90. The filter mat 60 can beheld on the inner wall surface of the design cover 80 (FIG. 3) or it isinserted in the basic casing. The lamellar elements 90 are held inretaining elements 81, 82 which constitute the frame of the design cover80.

The covering device 100 consists of a frame-type casing 30 for receivingthe filter mat 60 and of a design cover 80 fixedly, detachably orswivellably held in the casing 30, which covers the filter mat 60. Thisdesign cover 80 comprises at least two lateral retaining elements 81, 82having preferably the shape of cheeks, extending on the edge in alongitudinal direction L, between which the lamellar elements 90 areplaced (FIGS. 4 and 5). the lamellar elements 90 are placed spaced fromeach other by simultaneously overlapping each other sectionwise andwhich are placed obliquely in such a manner that the respectively frontand outer situated lamellar edges 91 are placed lower than the rearlamellar edges 92. The upper rear lamellar edges 92 of the lamellarelements 92 which have an arc-shaped configuration, have barb-shaped orhook-shaped configured conformations 95 (FIGS. 6 to 8, 8A and 9).

As the FIGS. 8, 8A and 9 show, each lamellar element 90 has in its upperarea 90 a a section 90′ orientated against the air admission with ahook-type configuration 95. The section 90′ with the hook-typeconfiguration 95 extends over the length of the lamellar element 90.This being, the lamellar elements 90 are placed with respect to eachother in such a manner that the lamellar elements overlap sectionwise,whereby the respective lower area 90b of each lamellar element issituated on a horizontal plane E below the section 90′ with thehook-type configuration or on a horizontal plane E1 above the section90′ with the hook-type configuration 95 or in an area between the twoplanes E and E1.

Moreover, the single lamellar elements 90 are placed with respect toeach other in such a manner that a high optical overlapping and a visualprotection of the filter mat 60 is obtained with an optimal airpermeability.

In order to achieve a noise optimized lamellar shape, each lamellarelement 90 has rounded front longitudinal border edges 96.

The rear lamellar edge 92 which has the barber-type configuration 95 ofeach lamellar element 90 has a cross-section shape which correspondsapproximately to the shape of a half circle with a section 95 aprojecting on the front side. The area of the front lamellar edge 91 ofeach lamellar element 90 has a material reinforcement 97 so that thelower situated front border edge section 91 a of each lamellar elementhas a bigger thickness compared to the rear and higher situated borderedge area 92 a. Because of this configuration, each lamellar element 90has an arc-shaped surface which merges in the upper area of eachlamellar element into the barb-type lamellar configuration. In thismanner, water sucked by the fan of the device for passage of air 200 isretained by the barb-type configuration 95 of the single lamellarelements 90 and drops off downwards or single accumulating droplets growand run out then to the front.

The design cover 80 with its lamellar elements 90 is preferably made ofa synthetic material or of another appropriate material.

In FIG. 9, two superimposed lamellar elements 90 are represented whichare placed with respect to each other in such a manner that thereresults an overlap. The lamellar elements 90 are configuredapproximately S-shaped, whereby a material padding 98 is provided in thefront bent-off area 90 b of each lamellar element so that an aerodynamicarea is created since without this measure it can come to air quantitylosses. The upper area 90 a of each lamellar element 90 has thehook-type configuration 95. The respective overlap area of two lamellarelements 90 is indicated by 99.

Each lamellar element 90 can be configured in one piece (FIG. 4) or intwo pieces (FIG. 5) or consist of several sections of same length orwith a different length.

LIST OF REFERENCE NUMERALS

-   200 Device for the passage of air-   100 Covering device-   20 Blast-   21 Basic casing-   25 Blast support-   26 Blast-   30 Frame-type casing-   50 Mounting breach-   51 Wall-   60 Filter mat-   80 Design cover-   81 Retaining elements-   82 Retaining elements-   90 Lamellar elements-   90 a Upper area-   90 b Front area-   91 Front lamellar edges-   91 a Front border edge area-   92 Rear lamellar edges-   92 a Rear border edge area-   95 Barb-type configuration-   95 a Projecting section-   96 Rounded front longitudinal border edges-   97 Material reinforcement-   98 Material padding-   99 Overlapping area

1. Covering device (100), in particular for covering the front area of adevice for the passage of air (200), such as a filter fan or an outletfilter, for fitting into an opening in a wall of a casing, in particularof a casing of waste heat producing components, of an electroniccupboard, of a switch cupboard, of a casing system or of a computersystem, and for the filter mat (60) of the device for the passage ofair, whereby the covering device comprises a design cover (80) whichcovers the filter mat (60) with a number of inclined lamellar elements(90), wherein each lamellar element (90) has in its upper area (90a) asection (90′) with a hook-type configuration (95) orientated against theair admission.
 2. Covering device according to claim 1, wherein thesection (90′) with the hook-type configuration (95) extends over thelength of the lamellar element (90).
 3. Covering device according toclaim 1, wherein the lamellar elements (90) are placed to each other insuch a manner that the lamellar elements overlap sectionwise, wherebythe lower area (90 b) of each lamellar element is situated on ahorizontal plane (E) below the section (90′) with the hook-typeconfiguration (95) or on a horizontal plane (E1) situated above thesection (9QT) with the hook-type configuration (95) or in an areabetween both planes (E, E1).
 4. Covering device according to claim 1,wherein the covering device (100) consists of a frame-type casing (30)for receiving the filter mat (60) and a design cover (80) held fixedly,detachably or swivellably in the casing (30) and covering the filter mat(60), which comprises at least two lateral retaining elements (81, 82)having preferably the shape of cheeks, extending on the edge in alongitudinal direction (L) between which several lamellar elements (90)are placed which are placed spaced from each other by simultaneouslyoverlapping each other sectionwise and which are placed obliquely insuch a manner that the respectively front and outer situated lamellaredges (91) are placed lower than the rear lamellar edges (92), wherebythe upper rear lamellar edges (92) of the lamellar elements (90) whichhave preferably an arc-shaped configuration, have a barb-shapedconfiguration (95).
 5. Covering device according to claim 1, wherein thesingle lamellar elements (90) are placed with respect to each other insuch a manner that a high optical overlapping and a visual protection ofthe filter mat (60) is obtained with an optimal air permeability. 6.Covering device according to claim 1, wherein the lamellar element (90)which has an approximately S-shaped configuration has a material padding(98) in its lower arc-shaped area and below.
 7. Covering deviceaccording to claim 1, wherein the rear lamellar edge (92) of eachlamellar element (90) which has the hook-type configuration (95) has across-section shape which corresponds approximately to the shape of ahalf circle with a section (95a) projecting on the front side. 8.Covering device according to claim 1, wherein the area of the frontlamellar edge (91) of each lamellar element (90) has a materialreinforcement (97) so that the lower situated front border edge area (91a) of each lamellar element has a bigger thickness compared to the rearand higher situated border edge area (92 a).
 9. Covering deviceaccording to claim 1, wherein the design cover (80) with its lamellarelements 90 is preferably made of a synthetic material or of anotherappropriate material.
 10. Covering device according to claim 1, whereinfor achieving a noise optimized lamellar shape of each lamellar element,each lamellar element (90) has rounded front lamellar edges (96). 11.Device for the passage of air (200) such as filter fan or outlet filterfor fitting in an opening in a wall of a casing, in particular of acasing of waste heat producing components, of an electronic cupboard, ofa switch cupboard, of a casing system or of a computer system, and forthe filter mat (60) of the device for the passage of air which comprisesa covering device (100) for covering the front area which has a designcover (80) covering the filter mat (60) with a number of inclinedlamellar elements (90), whereby each lamellar element (90) has in itsupper area (90 a) a section (90 V) with a hook-type configuration (95)orientated against the air admission.
 12. Device for the passage of airaccording to claim 11, wherein the section (90) with the hook-typeconfiguration (95) extends over the length of the lamellar element (90).13. Device for the passage of air according to claim 11, wherein thelamellar elements (90) of the covering device (100) are placed withrespect to each other in such a manner that the lamellar elementsoverlap sectionwise, whereby the lower area (90 b) of each lamellarelement is situated on a horizontal plane (E) below the section (90V)with the hook-type configuration (95) or on a horizontal plane (E1)above the section (90 fl with the hook-type configuration (95) or in anarea between the two planes (E and E1).
 14. Device for the passage ofair according to claim 11, wherein the covering device (100) consists ofa frame-type casing (30) for receiving the filter mat (60) and a designcover (80) held fixedly, detachably or swivellably in the casing (30)and covering the filter mat (60), which comprises at least two lateralretaining elements (81, 82) having preferably the shape of cheeks,extending on the edge in a longitudinal direction (L), between whichseveral lamellar elements (90) are placed which are placed spaced fromeach other by simultaneously overlapping each other sectionwise andwhich are placed obliquely in such a manner that the respectively frontand outer situated lamellar edges (91) are placed lower than the rearlamellar edges (92), whereby the upper rear lamellar edges (92) of thelamellar elements (90) which have preferably an arc-shapedconfiguration, have a barb-shaped configuration (95).
 15. Device for thepassage of air according to claim 11, wherein the single lamellarelements (90) are placed with respect to each other in such a mannerthat a high optical overlapping and a visual protection of the filtermat (60) is obtained with an optimal air permeability.
 16. Device forthe passage of air according to claim 11, wherein the lamellar element(90) which has an approximately S-shaped configuration has a materialpadding (98) in its lower arc-shaped area and below.
 17. Device for thepassage of air according to claim 11, wherein the rear lamellar edge(92) of each lamellar element (90) which has the hook-type configuration(95) has a cross-section shape which corresponds approximately to theshape of a half circle with a section (95 a) projecting on the frontside.
 18. Device for the passage of air according to claim 11, whereinthe area of the front lamellar edge (91) of each lamellar element (90)has a material reinforcement (97) so that the lower situated frontborder edge section (91 a) of each lamellar element has a biggerthickness compared to the rear and higher situated border edge area (92a).
 19. Device for the passage of air according to claim 11, wherein thedesign cover (80) with its lamellar elements (90) is made of a syntheticmaterial or of another appropriate material, whereby the lamellarelements are configured in one or several parts.
 20. Device for thepassage of air according to claim 11, wherein in order to achieve anoise optimized lamellar shape, each lamellar element (90) has roundedfront longitudinal border edges (96).